[Error] Undefined constant "SUM" (0) /home/g/gavan/xn----7sbkfplbe1ct1jva.xn--p1ai/public_html/bitrix/php_interface/include/functions.php:63 #0: product_discount_list() /home/g/gavan/xn----7sbkfplbe1ct1jva.xn--p1ai/public_html/bitrix/php_interface/include/functions.php:73 #1: show_products_discount_list(integer) /home/g/gavan/xn----7sbkfplbe1ct1jva.xn--p1ai/public_html/sale/index.php:4 ----------